Can you use Prefabs with Unity Free

I was able to build and run my game. But after my trial ran out, it builds but doesn’t assign my prefabs. I dynamically instantiate them in script.

Just wondering if this is happening because my trial how run out, or is it unable to found my Resources. I am thinking they would have been part of the build.

Error: the thing you are trying to instantiate is Null

The game plays fine in editor with no errors. Only errors when built.

You are definitely able to use prefabs with unity free.